WooCommerce BOGO Checkout Fix

My WooCommerce store is running a Buy-One-Get-One-Free promotion through a third-party plugin, but customers can’t redeem it. The offer shows in the cart, yet the discount disappears when they proceed to checkout and the total jumps back to full price. I also see a mismatch between the “Add to Cart” price displayed on the landing page and the final amount charged.

I need someone who can dive into the existing third-party BOGO plugin setup, trace where the logic breaks between cart and checkout, and restore the automatic discount so it flows correctly from landing page → cart → payment. Any tweaks required on the landing page template or checkout template to surface the right price and messaging should be included.

Deliverables:
• Diagnose and repair the BOGO application so the free item and correct total appear all the way through checkout.
• Sync landing-page price display with the live cart calculation.
• Test on desktop and mobile, confirming the fix across at least one staging and the live environment.
• Provide a brief summary of changes so future updates don’t overwrite the fix.

The quicker we can get this running smoothly, the better, as the promotion is time-sensitive.